linux-kernel - Re: [PATCH v7u1 26/31] x86: Don't enable swiotlb if there is not enough ram for it

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Date:	Thu, 24 Jan 2013 13:50:58 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Shuah Khan <shuahkhan@...il.com>
Cc:	Konrad Rzeszutek Wilk <konrad@...nel.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Borislav Petkov <bp@...en8.de>, Jan Kiszka <jan.kiszka@....de>,
	Jason Wessel <jason.wessel@...driver.com>,
	linux-kernel@...r.kernel.org, Joerg Roedel <joro@...tes.org>
Subject: Re: [PATCH v7u1 26/31] x86: Don't enable swiotlb if there is not
 enough ram for it

On Thu, Jan 24, 2013 at 11:22 AM, Shuah Khan <shuahkhan@...il.com> wrote:
>>
>> I still have the AMD system I tested earlier versions of this work. I
>> started compiles with these patches on 3.7 and will let you know the
>> status.
>
> Tested 3.8-rc4 with the patches on AMD system with IOMMU on. Looks
> good. I can't test low memory paths on this system very easily without
> mucking with the code and force it treat it as low memory. So I just
> tested the normal path. My main goal was to make sure AMD iommu driver
> can still enable switolb and it does.

good.

>
> If you would like to me test the error cases, please let me know.

please check
git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git
for-x86-boot

and boot your test setups with memmap=4095$1M

Thanks

Yinghai
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